jatin510 opened a new issue, #13872: URL: https://github.com/apache/datafusion/issues/13872
### Describe the bug How `array_repeat` works currently for `null` as input in array or key: ``` > SELECT array_repeat(null,0 ) AS repeated_array; +----------------+ | repeated_array | +----------------+ | [] | +----------------+ 1 row(s) fetched. Elapsed 0.006 seconds. > SELECT array_repeat(null,1 ) AS repeated_array; +----------------+ | repeated_array | +----------------+ | [] | +----------------+ 1 row(s) fetched. Elapsed 0.002 seconds. > SELECT array_repeat(null,2 ) AS repeated_array; +----------------+ | repeated_array | +----------------+ | [, ] | +----------------+ 1 row(s) fetched. Elapsed 0.004 seconds. > SELECT array_repeat(ARRAY[1, 2], null) AS repeated_array; Internal error: could not cast value to arrow_array::array::primitive_array::PrimitiveArray<arrow_array::types::Int64Type>. This was likely caused by a bug in DataFusion's code and we would welcome that you file an bug report in our issue tracker ``` is this a desired behaviour ? - why : `SELECT array_repeat(null,0 ) AS repeated_array;` & `SELECT array_repeat(null,1) AS repeated_array;` are same ? - if we check this out, the length is also not same, but above both look same ? ``` > SELECT ARRAY_LENGTH(array_repeat(null, 1)); +-------------------------------------------+ | array_length(array_repeat(NULL,Int64(1))) | +-------------------------------------------+ | 1 | +-------------------------------------------+ 1 row(s) fetched. Elapsed 0.006 seconds. > SELECT ARRAY_LENGTH(array_repeat(null, 0)); +-------------------------------------------+ | array_length(array_repeat(NULL,Int64(0))) | +-------------------------------------------+ | 0 | +-------------------------------------------+ ``` When I was trying to use them with `datafusion-comet`. I found out spark works differently with `NULL` as input ``` spark-sql (default)> SELECT a, b, c, array_repeat(null , 0) AS array_after_removal from temp_table; 4 NULL 22 [] 1 2 3 [] Time taken: 0.138 seconds, Fetched 6 row(s) spark-sql (default)> SELECT a, b, c, array_repeat(null , 1) AS array_after_removal from temp_table; NULL 2323 22 [null] 4 NULL 22 [null] 1 2 3 [null] Time taken: 0.107 seconds, Fetched 6 row(s) spark-sql (default)> SELECT a, b, c, array_repeat(array(a, b, c), null) AS array_after_removal from temp_table; NULL 2323 22 NULL 4 NULL 22 NULL ``` ### To Reproduce _No response_ ### Expected behavior _No response_ ### Additional context Is this the desired behaviour of `array_repeat` or we going to make some changes to the functionality, especially in case of `array_repeat(null, 1)` and `array_repeat(null, 0)` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
